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[rs] Update create_buffer_init_polyfill for wasm32

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Alan Kemp
2020-11-09 21:22:03 +00:00
parent ccc178a3d0
commit e1b05a583a
1 changed files with 5 additions and 9 deletions
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14
wgpu/src/backend/web.rs
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@@ -50,18 +50,14 @@ impl Context {
) -> Sendable<web_sys::GpuBuffer> {
// Emulate buffer mapping with the old API. This is a temporary
// polyfill until the new buffer mapping API is available on gecko.
let mut mapped_desc =
let mut buffer_desc =
web_sys::GpuBufferDescriptor::new(desc.size as f64, desc.usage.bits());
if let Some(label) = desc.label {
mapped_desc.label(label);
buffer_desc.label(label);
}
let pair = device.0.create_buffer_mapped(&mapped_desc);
let buffer: web_sys::GpuBuffer = pair.get(0).into();
let array_buffer: js_sys::ArrayBuffer = pair.get(1).into();
let mapped = js_sys::Uint8Array::new(&array_buffer);
let js_contents: js_sys::Uint8Array = contents.into();
mapped.set(&js_contents, 0);
buffer.unmap();
let buffer = device.0.create_buffer(&buffer_desc);
let data = js_sys::Uint8Array::from(contents).buffer();
device.0.default_queue().write_buffer_with_u32(&buffer, 0, &data);
Sendable(buffer)
}
}